ESPN analyst Steve Phillips had a fling with a 22-year-old production assistant, who, after being dumped, taunted his wife with “Fatal Attraction”-like phone calls and a letter that bragged about her sexcapades with Phillips while taking pot shots at their “loveless marriage,” The Post has learned.

The former Met general manager, whose tenure with the team was rocked by admissions of infidelity, confessed to his wife and local cops that he had slept with ESPN assistant Brooke Hundley several times this past summer before dumping her.

Hundley’s desperate actions — including accidentally smashing her car into a stone column while speeding away from the Phillips’ home after leaving the letter — terrified the family, according to the Wilton, Conn., police report.

“I have extreme concerns about the health and safety of my kids and myself,” Steve Phillips said in a police statement, adding that the woman became “obsessive and delusional” after he dumped her.

But Phillips, 46, declined to pursue criminal charges against Hundley, a Bristol, Conn., woman who cops learned may have used an ESPN computer to contact Phillips’ 16-year-old son on Facebook while posing as a high-school classmate.

Phillips — who admitted having multiple affairs with women while working for the Mets — is now being sued for divorce by his 40-year-old wife, the mother of his four sons. Two months ago, Phillips deeded the family’s five-bedroom, multimillion-dollar Wilton home to her.

“We were aware of this and took appropriate disciplinary action at the time,” ESPN said in a statement. “We have granted Steve’s request for an extended leave of absence to allow him to address it. We have no further comment.”

Phillips did not return calls seeking comment.

Hundley, too, refused to talk when reached by The Post last night.

The bombshell developments come 11 years after Phillips took a brief leave of absence as the Mets’ GM after admitting to having sex with a team employee, Rosa Rodriguez, who sued him for sexual harassment, a case later settled out of court.

In a Wilton police report obtained by The Post, Phillips said he first met Hundley on July 13 in St. Louis when she was working as an assistant for remote-game productions for ESPN.

“Over a three-week span, I had a total of three sexual encounters with her,” Phillips said in his police filing. “Those were the only times I spent any time alone with her.”

He said his rejection of Hundley was “met by varying degrees of disappointment and hurt; more than was appropriate based on what the relationship was.”

Then, Marni Phillips told cops, on the night of Aug. 5, she began repeatedly receiving harassing phone calls and text messages from a woman who claimed to have information about her husband.

When Marni called Phillips at work, he came home and confessed to the affair.

On Aug. 16, Marni said, Hundley left her “a detailed and very disturbing voice-mail message on my cellphone and a [text] message late that night.”

“The tone of the text message was, ‘I care about Steve, I make him happy, and we both can’t have him,’ ” Marni said.

Steve and Marni Phillips were unaware at the time that their son had been contacted on the Internet by someone identifying herself as a classmate, asking him personal questions about the family.

“She said that she had overheard my mom telling someone at my brother’s baseball game that my dad really likes someone at work and is probably going to move out and that if I need to talk to anyone, she would be willing to listen because her parents went through the same thing,” the boy told cops.

“She asked inappropriate questions about my parents, such as: Do they sleep in the same bed? Do you think they will be getting a divorce? Do they fight a lot?” the youth added.

He said the woman even tried flirting with him to get information.

“She told me that she had stopped by the [football] field before to see me [practice] . . . She often awkwardly, flirtatiously complimented me, saying that I was a very sweet and nice guy.”

But the son said he grew angry when she referred to his mother as his dad’s “baby mama.”

“[She] would often make comments of how lucky my mom was to marry a guy with money and not have to work . . . The tone was very jealous,” he said.

The boy added that when he didn’t immediately respond to the writer, she would start bombarding him with messages.

“Countless times, she asked me for my home phone number and stated that . . . her parents needed to contact my mother immediately,” the rattled teen said.

The kid also began receiving numerous Facebook friend-requests from Hundley.

Marni Phillips, a stunning, green-eyed blonde, told cops that on Aug. 19, she drove home with her 7-year-old son and spotted a woman walking down the driveway to a parked car.

“I knew instinctively this was the woman Steve was involved with and I was terrified,” Marni told cops. “I immediately called 911. She got in her car, put it in reverse and smashed the rear end of her vehicle into the stone column.”

Marni then found the letter stuck in the door.

In the letter, Hundley details her affair with Phillips, and mentions “a big birthmark on his crotch . . . and one on his left inner thigh, so you know I’m not being fake.”